What is the purpose of a prefix?

Answer 1

The derivational suffix tells you what kind of word it is: eg noun or adjective. For example -or (actor) indicates a noun.

The inflectional suffix tells you something about the words grammatical behaviour. For example -s indicates that a noun is plural.

Answer 2

They are important because they add meanings to thousands of words.

Answer 3

THeir similarity is they are both affixes.

Answer 4

A prefix is something added before the word to change its meaning, like redo. Re is the prefix. A suffix is added after the word to change its meaning, like doing. Ing is the suffix.

Answer 5

to state how to do something